CHAPTER 2:

WARNING: READ AT OWN RISK!!!!!

NUTRITION

Feat.Fried Noodles and Prawns x)

INDEX1.Group profile

2. Classes of food

3. Process of digestion in the alimentary canal

GROUP PROFILEGroup title : Fried noodles and prawns(err..)Group name: IDKGroup members: Nur liyana( leader :p) Rais Hafizuddin( assist. leader :/) Keshia Jasmine( an IDK) Cheng Jia Hui( an IDK) Vivienne( a hyper IDK)

CLASSES OF FOODBefore we start, let me tell you some thing about ‘classes of food’.

There are 7 classes of food…but I’m sure you already know that but I’m still gonna tell you anyway.

Here are the 7 classes of food:

a)Carbohydrates*You probably know about this. Everyone does..

*It supplies energy(duh..)

*Examples: bread, rice, noodles and anything else you can think of…(my mind is pretty blank at the moment)

b)Proteins*OK you should know this too

*Their needed for growth and repairing body tissues

*Examples: meat, chicken … wait isn’t chicken meat???

c)Fats*Ok who doesn’t know this is truly DUMB!!!

*It helps to keep us warm and protects our body from damage

*If you consume too much..I only have one word for you…

OBESITY!!!!*Examples: cooking oil, margarine, peanuts and most importantly butter

d)Vitamins*Ok I’m pretty confident that everyone knows this!!! Then again…

*Their organic compounds needed in small amounts by our body for health and growth

*If too much vitamins are consumed there will be deadly consequences…

*Examples: milk, oranges, carrots, vegetables and cod liver oil( bleah)

*Examples of vitamins: A, B, C, D, and K

e)Minerals*Their inorganic substances needed by our body to grow and .. develop*Examples: Cheese, prawns, vegetables, milk, salt and eggs

*Examples of minerals: Calcium, sodium, iron, iodine, phosphorus, and potassium

f)Fibre*ok so here is the basic part about fibre. I don’t want to explain it so long because I’m too lazy already

*Its called roughage and it prevents constipation. That’s it. Oh and examples

are fruits and vegetables

Ok relax, there is only 3 more left…

Only 2 more…

Only 1 more…

g)Water

*It’s the main component for our blood and body fluids.*Helps to dispose of the waste materials in the body such as… you don’t wanna know(trust me)

*Examples: um…water???

OK now to get to our real assignment(finally).

These are the classes of food that we have found in… FRIED NOODLES AND PRAWNS/WORMS AND INTESTINES.

Classes of food  General Ingredients in the food 

Carbohydrates   Noodles

Proteins  Prawns, and eggs 

Fats  Cooking oil 

Minerals  Salt, Green Vegetables, and Prawns 

Fibre  Green vegetables 

Others worms and intestines ??

 

THE PROCESS OF DIGESTION IN THE ALIMENTARY CANALOur body obviously cant absorb the food straight away. They have to be broken down first. So how does our body break them down??? Here let me tell you.

Firstly, you have to know that the process of breaking down large food molecules into smaller food molecules is called digestion.

Digestion occurs in an 8m long tube called: THE GUT OR THE ALIMENTARY CANAL. The gut begins at the mouth and ends at the (gulp)anus. The other 2 organs are the liver and the pancreas, secrete chemicals to break down the food that we eat.(honestly , this thing is disgusting:P)

Anyways, back to business or studies…

As the food passes down the gut it is broken down into smaller and simpler forms by physical and chemical

digestion. Physical digestion includes chewing by the teeth and the churning of the food in the stomach. Chemical digestion involves the action of enzymes on food.

Enzymes are substances which act as catalysts and generally speed up the chemical reactions in our body. There are 3 main kinds of enzymes in our gut. They are:

*amylase which breaks down the carbohydrates molecules such as starch into maltose or glucose

*proteases which break down protein molecules into amino acids

*lipases which break down fat molecules into fatty acids and glycerol

THE ORGANS OF THE DIGESTIVE SYSTEM

Our digestive system consists of many different organs.

And you should know all this unless you were planning to fail your exam… but I’m gonna tell you about it anyways..:)

There are 5 parts to the digestive system:

no. 1- mouth

no. 2- oesophagus

no. 3- stomach

no. 4- deodenum

no. 5- small intestine

no. 1- The mouth

1. Ok yeah, everyone knows about the mouth so I’m not gonna explain so much about it

2. This is where the food is chewed into smaller pieces and mixed with the secreted by the salivary glands

3. The salivary amylase catalyses the breaking down of the starch into maltose ( some kind of sugar I have never heard of)

4. Saliva also contains mucus. I don’t know what the function of mucus in the mouth so don’t ask me…

No. 2- the oesophagus

1. Ok there’s nothing much about the oesophagus (luckily)so here’s what you need to know

2. When the digested food is shaped into a bolus (which sounds pretty disgusting to me) it is pushed down the oesophagus in some kind of wave-like action(which also seems disgusting somehow) and guess what its called…peristalsis

3. Peristalsis occurs when the oesophageal wall contracts and expands alternately( if you don’t know what that means check it out in the dictionary because I really have no clue)

4. Actually, its kinda long…:P

No. 3- stomach

1. The stomach is like super basic so you should know it…if you don’t you suck!!

2. The stomach wall produces gastric juices that contain proteases and hydrochloric acid

3. The hydrochloric acid: * stops the action of the salivary amylase * provides an acidic medium suitable for the

action of the proteases *changes the inactive forms to active forms *kills bacteria in the food4. The protease catalysis the break down of

proteins to polypeptides5. DONE!! Not really…

No. 4- duodenum

1. Ok so as you all know the duodenum consists of the liver and the pancreas(ugh..so much to write)

2. The liver produces bile to emulsify fat( I think emulsify means break it down???)

3. The pancreas secretes:

*amylase which breaks down the carbohydrates molecules such as starch into maltose or glucose

*proteases which break down protein molecules into amino acids

*lipases which break down fat molecules into fatty acids and glycerol

No. 5- small intestine

1. The small intestine secretes intestinal juice which contains: Maltase Protease Lipase

2. Maltase breaks down maltose into glucose.

3. Protease breaks down polypeptides into amino acids.

4. Lipase breaks down fats into fatty acids and glycerol.

Other parts of the digestive systems

Parts Function

Tongue Digested food is shaped into bolus by the tongue

Teeth To chew the food into smaller pieces

Large intestine

Reabsorbs water and dissolved minerals

Gall Bladder Stores bile

Pancreas Produce pancreatic juice

Liver Produces bile

Tx for watching. Hoped you liked it.

Special tx to:

Our helpful parents

Supportive teachers

And of course, Miss Goh Wai Moi:P